ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
Doubly Fed Induction Generator for Wind Energy Conversion Systems with Integrated Active Filter Capabilities ABSTRACT This paper deals with the operation of doubly fedinduction generator (DFIG) with an integrated active filter capabilities using grid-side converter (GSC). The main contribution of this work lies in the control of GSC for supplying harmonics in addition to its slip power transfer. The rotorside converter (RSC) is used for attaining maximum power extraction and to supply required reactive power to DFIG. This wind energy conversion system (WECS) works as a static compensator (STATCOM) for supplying harmonics even when the wind turbine is in shutdown condition. Control algorithms of both GSC and RSC are presented in detail.The proposed DFIGbasedWECS is simulated using MATLAB/Simulink. A prototype of the proposed DFIGbasedWECS is developed using a digital signal processor (DSP). Simulated results are validated with test results of the developed DFIG for different practical conditions, such as variable wind speed and unbalanced/single phase loads.
KEYWORDS 1. Doubly fed induction generator (DFIG) 2. integrated active filter 3. nonlinear load 4. power quality 5. wind energyconversion system (WECS).
SOFTWARE:MATLAB/SIMULINK
For Simulation Results of the project Contact Us
Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245 BLOCK DIAGRAM:
Fig. 1.Proposed system configuration.
Fig. 2. Control algorithm of the proposed WECS.
For Simulation Results of the project Contact Us
Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245 EXPECTED SIMULATION RESULTS
Fig. 3.Simulated performance of the proposed DFIG-based WECS at fixed wind speed of 10.6 m/s (rotor speed of 1750 rpm).
For Simulation Results of the project Contact Us
Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
Fig. 4. Simulated waveform and harmonic spectra of (a) grid current (iga), (b) load current (ila), (c) stator current (isa), and (d) grid voltage for phase “a”
For Simulation Results of the project Contact Us
Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245 (vga) at fixed wind speed of 10.6 m/s (rotor speed of 1750 rpm).
Fig. 5.Simulated performance of the proposed DFIG-basedWECS working as a STATCOM at zero wind speed.
For Simulation Results of the project Contact Us
Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
Fig. 6. Simulated waveforms and harmonic spectra of (a) load current (ila) and (b) grid current (iga) working as a STATCOM at wind turbine shut down condition.
For Simulation Results of the project Contact Us
Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
Fig. 7.Simulated performance of proposed DFIG for fall in wind speed.
For Simulation Results of the project Contact Us
Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
Fig. 8.Dynamic performance of DFIG-based WECS for the sudden removal and application of local loads.
For Simulation Results of the project Contact Us
Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245 CONCLUSION The GSC control algorithm of the proposed DFIG has been modified for supplying the harmonics and reactive power of thelocal loads. In this proposed DFIG, the reactive power for the induction machine has been supplied from the RSC and the load reactive power has been supplied from the GSC. The decoupled control of both active and reactive powers has been achieved by RSC control. The proposed DFIG has also been verified at wind turbine stalling condition for compensating harmonics and reactive power of local loads. This proposed DFIGbased WECS with an integrated active filter has been simulated using MATLAB/Simulink environment, and the simulated results are verified with test results of the developed prototype of this WECS. Steady-state performance of the proposed DFIG has been demonstrated for a wind speed. Dynamic performance of this proposed GSC control algorithm has also been verified for the variation in the wind speeds and for local nonlinear load.
REFERENCES [1]
D. M. Tagare, Electric Power Generation the Changing Dimensions.Piscataway, NJ, USA: IEEE Press, 2011.
[2]
G. M. Joselin Herbert, S. Iniyan, and D. Amutha, “A review of technicalissues on the development of wind farms,” Renew. Sustain. Energy Rev.,vol. 32, pp. 619–641, 2014.
[3]
I.Munteanu, A. I. Bratcu, N.-A. Cutululis, and E. Ceang, Optimal Controlof Wind Energy Systems Towards a Global Approach. Berlin, Germany:Springer-Verlag, 2008.
[4]
A. A. B. MohdZin, H. A. Mahmoud Pesaran, A. B. Khairuddin,L. Jahanshaloo, and O. Shariati, “An overview on doubly fed inductiongenerators controls and contributions to wind based electricity generation,”Renew. Sustain. Energy Rev., vol. 27, pp. 692–708, Nov. 2013.
[5]
S. S. Murthy, B. Singh, P. K. Goel, and S. K. Tiwari, “A comparativestudy of fixed speed and variable speed wind energy conversion systemsfeeding the grid,” in Proc. IEEE Conf. Power Electron. Drive Syst.(PEDS’07), Nov. 27–30, 2007, pp. 736–743.
For Simulation Results of the project Contact Us
Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245